I see that all of us want to see Aalek recover, but based on the books, and if I am right, Aalek is schizophrenic. If so, then he CANNOT recover, yes, they can control him, thus the shots and medicines; but, if the creative heads are staying true to subject matter, which so far has be true, then Aalek wouldn't recover completely.
If Sadhna and Aalek have children, which is possible, then their child might be prone to become like Aalek.
Again, these are the facts, but this is just a serial and things can be VERY different.
Sorry to burst your bubble.
Finally, will they ever tell us more about Vasu and Ambika and how they ended up in the same household?